CDZ: Difference between revisions

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[[File:Cdz_ov.jpg]]
Yes, it has a 2x CD drive, which is used at 2x speed. [[Loading time]]s aren't exactly cut by 2 when comparing to older models due to fixed delays caused by CPU data copy.


[[File:Cdz_ovtop.jpg]]
It is obvious that SNK anticipated the possibility of integrating the CD drive's electronics directly onto the motherboard. This apparently has never been done.


{{Chipname|NEO-GRC2-F}}
Board layout really looks like the NeoGeo Pocket.


[[File:Cdz_dsp.jpg|400px]]
[[File:Cdz_ov.jpg]]
 
See [[optical pickups]]
 
[[File:Cdz_opickup.jpg]]
 
Sanyo {{Chipname|LC89513}} CD host chip:
 
[[File:Cdz_lc89513.jpg]]
 
[[File:Cdz_driveassy.jpg]]
 
[[File:Cdz_cdmotordrv.jpg]]
 
[[File:Cdz_9295.jpg]]
 
{{Chipname|Z80}}, its RAM and 1MiB [[PCM]] [[DRAM]]:
 
[[File:Cdz_z80ss.jpg]]
 
Same weird voltage limiting power supply circuit:
 
[[File:Cdz_psu.jpg]]
 
[[File:Cdz_ga3.jpg|400px]]
 
[[File:Cdz_jumpers.jpg]]
 
System ROM: TOP-SPD.
[[File:Cdz_bios.jpg]]
 
Unpopulated fotprint for CD drive chips:
 
[[File:Cdz_cdmotordrvfp.jpg|400px]]


[[File:Cdz_mcufp.jpg]]
<gallery>
File:Cdz_ovtop.jpg|Main board using {{Chipname|NEO-GRC2-F}}
File:Cdz_dsp.jpg|CD DSP
File:Cdz_opickup.jpg|See [[optical pickups]]
File:Cdz_lc89513.jpg|Sanyo {{Chipname|LC89513}} CD host chip (able to do 4x speed by the way)
File:Cdz_driveassy.jpg|CD drive
File:Cdz_cdmotordrv.jpg|Motor driver
File:Cdz_9295.jpg|CD driver mcu
File:Cdz_z80ss.jpg|{{Chipname|Z80}}, its RAM and 1MiB [[PCM]] [[DRAM]]
File:Cdz_psu.jpg|Same weird voltage limiting power supply circuit
File:Cdz_ga3.jpg|Standard-branded Fujitsu CG24 series gate array !
File:Cdz_jumpers.jpg|Configuration jumpers
File:Cdz_bios.jpg|[[System ROM]]: TOP-SPD
File:Cdz_cdmotordrvfp.jpg|Unpopulated...
File:Cdz_mcufp.jpg|...footprints...
File:Cdz_dspfp.jpg|for CD drive chips.
</gallery>


[[File:Cdz_dspfp.jpg]]
[[Category:CD systems]]

Latest revision as of 03:17, 16 August 2016

Yes, it has a 2x CD drive, which is used at 2x speed. Loading times aren't exactly cut by 2 when comparing to older models due to fixed delays caused by CPU data copy.

It is obvious that SNK anticipated the possibility of integrating the CD drive's electronics directly onto the motherboard. This apparently has never been done.

Board layout really looks like the NeoGeo Pocket.